Reflective electrochromic (EC) technology is expected to e‐paper display field, and integrating optical reflective electrolyte as the optical reflective layer is a common strategy for constructing reflective EC devices. Compositing inorganic particles and electrolytes is one of the simplest and most efficient composite methods, but these composite electrolytes usually cannot perform well together in terms of both optical and electrochemical properties. Herein, the TiO2 nanoparticles are added to the ethyl viologen‐based ionogel (T‐EVG, one typical kind of EC/electrolyte) to have the highest visible light reflectivity and the best electrochemical performance compared with SiO2, Al2O3, and ZnO nanoparticles, which is attributed to the electro‐induced self‐reduction TiO2 produced in T‐EVG during EC cycling. Meanwhile, the corresponding EC devices can display red, green, and blue, and have high optical contrast (CIE Lab: ΔE>38), fast switching spend (<4 s, the fastest is 5 Hz), ultra‐low power density (<4.0 mW cm−2), and excellent cycling stability (>85% retained after 10 000 cycles). Finally, a simple 3×3 pixelated EC display array is prepared, and single‐ and multi‐point (including diagonal points) multi‐color display effects are realized through active‐matrix driving and high‐frequency refresh, demonstrating its application value in the high‐performance e‐paper display.

中文翻译：

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用于多色电致变色显示器的紫罗碱基离子凝胶中的电致自还原 TiO2


反射式电致变色（EC）技术有望在电子纸显示领域得到应用，而集成光学反射电解质作为光学反射层是构建反射式EC器件的常见策略。将无机颗粒与电解质复合是最简单、最有效的复合方法之一，但这些复合电解质通常在光学和电化学性能方面不能很好地表现在一起。在此，将TiO2纳米颗粒添加到乙基紫罗碱基离子凝胶（T-EVG，一种典型的EC/电解质）中，与SiO2、Al2O3和ZnO纳米颗粒相比，TiO2纳米颗粒具有最高的可见光反射率和最佳的电化学性能，归因于 EC 循环期间 T-EVG 中产生的电致自还原 TiO2。同时，相应的EC器件可以显示红、绿、蓝，并具有高光学对比度（CIE Lab：ΔE>38）、快速切换花费（<4 s，最快为5 Hz）、超低功率密度（ <4.0 mW cm−2)，以及出色的循环稳定性（10 000 次循环后保留>85%）。最后，制备了简单的3×3像素化EC显示阵列，并通过有源矩阵驱动和高频刷新实现了单点和多点（包括对角点）多色显示效果，展示了其在应用领域的应用价值。高性能电子纸显示屏。